Backlight module and display apparatus

Abstract

A backlight module and a display apparatus are provided. The backlight module comprises a backlight source and optical sheets, wherein the backlight source is an organic electroluminescent device, the optical sheets are directly adhered to a light emitting side of the organic electroluminescent device facing a display panel. The light emitted by the organic electroluminescent device is directed emitted after passing through the optical sheets. The display apparatus comprises such a backlight module. A thickness of such backlight module can be efficiently reduced.

The invention claimed is: 
     
       1. A backlight module comprising a backlight source and optical sheets, wherein the backlight source comprises an organic electroluminescent device;
 the optical sheets are directly adhered to a light emitting side of the backlight source facing a display panel so that the light emitted by the organic electroluminescent device is directly emitted after passing through the optical sheets; and 
 wherein the backlight source further comprises a first substrate and a second substrate provided opposite to each other, and a frame glue sealing and connecting edges of the first substrate and the second substrate, wherein the organic electroluminescent device is disposed in a light emitting space surrounded by the first substrate, the second substrate and the frame glue. 
 
     
     
       2. The backlight module according to  claim 1 , wherein the organic electroluminescent device emits light from both sides, and the backlight module further comprises:
 a photovoltaic cell panel disposed at a side of the organic electroluminescent device facing away from the optical sheets and configured to convert the light emitted from the side of the organic electroluminescent device facing away from the optical sheets into electrical energy. 
 
     
     
       3. The backlight module according to  claim 2 , further comprising a storage battery electrically connected to the photovoltaic cell panel and configured to store the electrical energy generated by the photovoltaic cell panel. 
     
     
       4. The backlight module according to  claim 3 , wherein the storage battery is electrically connected to the display panel to power the display panel; and/or
 the storage battery is electrically connected to the organic electroluminescent device to power the organic electroluminescent device. 
 
     
     
       5. The backlight module according to  claim 4 , wherein the optical sheets are disposed at a side of the first substrate facing away from the organic electroluminescent device, and the photovoltaic cell panel is disposed at a side of the second substrate facing away from the organic electroluminescent device. 
     
     
       6. The backlight module according to  claim 3 , wherein the optical sheets are disposed at a side of the first substrate facing away from the organic electroluminescent device, and the photovoltaic cell panel is disposed at a side of the second substrate facing away from the organic electroluminescent device. 
     
     
       7. The backlight module according to  claim 3 , wherein orthographic projection of the photovoltaic cell panel on the second substrate at least covers orthographic projection of a region where the organic electroluminescent device is located on the second substrate. 
     
     
       8. The backlight module according to  claim 2 , wherein orthographic projection of the photovoltaic cell panel on the second substrate at least covers orthographic projection of a region where the organic electroluminescent device is located on the second substrate. 
     
     
       9. The backlight module according to  claim 2 , wherein the optical sheets are disposed at a side of the first substrate facing away from the organic electroluminescent device, and the photovoltaic cell panel is disposed at a side of the second substrate facing away from the organic electroluminescent device. 
     
     
       10. The backlight module according to  claim 1 , wherein the optical sheets are disposed at a side of the first substrate facing away from the organic electroluminescent device, and the photovoltaic cell panel is disposed at a side of the second substrate facing away from the organic electroluminescent device. 
     
     
       11. The backlight module according to  claim 1 , wherein the backlight source further comprises desiccant disposed in the emitting space surrounded by the first substrate, the second substrate and the frame glue. 
     
     
       12. The backlight module according to  claim 1 , wherein the first substrate and the second substrate each is a glass substrate. 
     
     
       13. The backlight module according to  claim 1 , wherein the organic electroluminescent device comprises an anode, a light emitting layer and a cathode provided in stack; and wherein
 the anode and the cathode each is a transparent electrode. 
 
     
     
       14. The backlight module according to  claim 13 , wherein the cathode is formed of nano silver material. 
     
     
       15. The backlight module according to  claim 13 , wherein the organic electroluminescent device further comprises a cathode modification layer disposed between the cathode and the light emitting layer. 
     
     
       16. The backlight module according to  claim 15 , wherein material for the cathode modification layer is lithium fluoride (LiF) material. 
     
     
       17. The backlight module according to  claim 1 , wherein the optical sheets comprise a light homogenizing film, a reflection reduction film, and a protection film provided in stack. 
     
     
       18. A display apparatus comprising a backlight module, wherein the backlight module comprising a backlight source and optical sheets, wherein the backlight source comprises an organic electroluminescent device;
 the optical sheets are directly adhered to a light emitting side of the backlight source facing a display panel so that the light emitted by the organic electroluminescent device is directly emitted after passing through the optical sheets; and 
 wherein the backlight source further comprises a first substrate and a second substrate provided opposite to each other, and a frame glue sealing and connecting edges of the first substrate and the second substrate, wherein the organic electroluminescent device is disposed in a light emitting space surrounded by the first substrate, the second substrate and the frame glue.